 |
| |||
| معالجة مياه الصرف الصحي ؛معالجة مياه المجاري | |||
| sewage treatment: 4 phrases in 3 subjects |
| Environment | 1 |
| Oil / petroleum | 1 |
| Waste management | 2 |
|
| |||
| معالجة مياه الصرف الصحي ؛معالجة مياه المجاري | |||
| sewage treatment: 4 phrases in 3 subjects |
| Environment | 1 |
| Oil / petroleum | 1 |
| Waste management | 2 |